On Sep 4, 2012, at 12:47 , Ian Hickson <i...@hixie.ch> wrote: > On Thu, 7 Jun 2012, Mark Callow wrote: >> >> IIRC Kodak's PhotoCD image format had this characteristic. The first >> part is a low res. image, the second is the differences between the low >> res. image zoomed to the high res. size and the actual high res. image. > > Such formats certainly would make a lot of this simpler!
supported in JPEG 2000 (for files in resolution progression order), FWIW David Singer Multimedia and Software Standards, Apple Inc.
